diff --git a/packages/backend/src/remote/activitypub/models/person.ts b/packages/backend/src/remote/activitypub/models/person.ts
index ab017b65a..b13ee23e8 100644
--- a/packages/backend/src/remote/activitypub/models/person.ts
+++ b/packages/backend/src/remote/activitypub/models/person.ts
@@ -313,7 +313,9 @@ export async function createPerson(
 			await transactionalEntityManager.save(
 				new UserProfile({
 					userId: user.id,
-					description: person.summary
+					description: person._misskey_summary
+						? truncate(person._misskey_summary, summaryLength)
+						: person.summary
 						? htmlToMfm(truncate(person.summary, summaryLength), person.tag)
 						: null,
 					url: url,
diff --git a/packages/backend/src/remote/activitypub/renderer/index.ts b/packages/backend/src/remote/activitypub/renderer/index.ts
index 7d2eb9528..c60a1f4cd 100644
--- a/packages/backend/src/remote/activitypub/renderer/index.ts
+++ b/packages/backend/src/remote/activitypub/renderer/index.ts
@@ -43,6 +43,7 @@ export const renderActivity = (x: any): IActivity | null => {
 					_misskey_talk: "misskey:_misskey_talk",
 					_misskey_reaction: "misskey:_misskey_reaction",
 					_misskey_votes: "misskey:_misskey_votes",
+					_misskey_summary: "misskey:_misskey_summary",
 					isCat: "misskey:isCat",
 					// Fedibird
 					fedibird: "http://fedibird.com/ns#",
diff --git a/packages/backend/src/remote/activitypub/renderer/person.ts b/packages/backend/src/remote/activitypub/renderer/person.ts
index 9f642bb9e..db176a0dd 100644
--- a/packages/backend/src/remote/activitypub/renderer/person.ts
+++ b/packages/backend/src/remote/activitypub/renderer/person.ts
@@ -74,6 +74,7 @@ export async function renderPerson(user: ILocalUser) {
 		summary: profile.description
 			? toHtml(mfm.parse(profile.description))
 			: null,
+		_misskey_summary: profile.description,
 		icon: avatar ? renderImage(avatar) : null,
 		image: banner ? renderImage(banner) : null,
 		tag,
diff --git a/packages/backend/src/remote/activitypub/type.ts b/packages/backend/src/remote/activitypub/type.ts
index 0e63f3ed5..cf0410767 100644
--- a/packages/backend/src/remote/activitypub/type.ts
+++ b/packages/backend/src/remote/activitypub/type.ts
@@ -205,6 +205,7 @@ export interface IActor extends IObject {
 	};
 	"vcard:bday"?: string;
 	"vcard:Address"?: string;
+	_misskey_summary?: string;
 }
 
 export const isCollection = (object: IObject): object is ICollection =>